Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Feb 9 19:49:31 2026 Auto Mode Machine = Linux oleg339-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg339-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 5346 18443 289635 158855 64 8 6126 7060 424198 224480 64 16 5469 36955 666414 557144 64 32 3280 40556 659861 727850 64 64 4278 92093 598110 1336792 128 4 6913 11461 165404 247656 128 8 9867 15619 392505 359398 128 16 13738 55365 494444 533241 128 32 2775 34803 229843 458548 128 64 15727 102813 831319 1022989 128 128 12750 174376 2098744 1749872 256 4 3958 8257 134388 136907 256 8 10965 11798 136907 236621 256 16 13838 35340 638445 283473 256 32 10082 48641 951219 910872 256 64 19922 60323 371561 1032636 256 128 14415 96240 1292410 512084 256 256 24622 147719 910872 1532153 512 4 6339 6273 325484 253605 512 8 10035 14193 130112 161832 512 16 13089 11722 211225 284141 512 32 17401 31476 278394 187131 512 64 36142 57742 1064794 585176 512 128 26138 49235 1429934 1320061 512 256 31191 85749 927716 574530 512 512 25228 75250 971357 525596 1024 4 4697 5308 72148 93576 1024 8 9513 12424 456532 245275 1024 16 18377 25591 246797 211879 1024 32 15360 29132 406650 831261 1024 64 14189 18459 1219189 455950 1024 128 31157 80238 1097669 556212 1024 256 19484 26269 608455 956178 1024 512 15918 82434 1063425 1943594 2048 4 4986 4841 76589 116284 2048 8 7861 9852 118614 151189 2048 16 8815 13238 186115 194031 2048 32 24010 31166 402908 350397 2048 64 17159 31958 393171 938092 2048 128 20179 42711 543811 1223496 2048 256 17853 37139 700429 283891 2048 512 20980 73581 896296 725206 4096 4 4641 4972 103010 93298 4096 8 8502 11012 157745 124279 4096 16 13083 15737 455460 328915 4096 32 26489 39601 469949 516908 4096 64 23269 29329 256015 461566 4096 128 21416 31276 439250 422610 4096 256 29795 55228 512376 660438 4096 512 18406 32420 1608179 826797 8192 4 4505 10946 132278 140659 8192 8 8035 8789 363104 136197 8192 16 17155 19495 328180 341006 8192 32 25885 25329 421898 234412 8192 64 23434 30510 734907 606047 8192 128 26506 37997 295591 366661 8192 256 33883 49055 401549 433278 8192 512 29167 35124 811657 559597 16384 4 4255 5656 83178 76687 16384 8 10551 11573 290594 252972 16384 16 18336 23237 417319 241569 16384 32 18829 27009 308800 182337 16384 64 21433 42563 325137 303683 16384 128 30574 51260 790535 642888 16384 256 44919 37896 415932 676520 16384 512 46376 49220 665449 600475 32768 4 5255 7231 79068 75245 32768 8 13679 13400 210474 127469 32768 16